India find themselves in a must-win situation after just one horrible day at the office as they prepare to take on debutants Bermuda in their second World Cup match here on Monday.

India suffered a shock five-wicket defeat against Bangladesh at the Queen's Park Oval here on Saturday and now need to win their remaining two Group B matches to keep alive their hopes of qualifying for the next Super Eight stage.

"I think it is pretty clear from now on. We have got to win the next two games and we have got to win them well. That's pretty clear," said India skipper Rahul Dravid.

"We have got our task cut out. It's about winning. The boys just have to knuckle down now. We have got our backs to the wall and we have got to keep fighting and do our best."

Sri Lanka and Bangladesh have posted one win in the four-team group, while Bermuda and India are winless after one game. Sri Lanka thrashed Bermuda by 243 runs in their opening game here on Thursday.

India suffered one of their worst World Cup defeats when they were outplayed by Habibul Bashar's side in all departments of the game. They could manage just 191, a total comfortably surpassed by their rivals.

"It's really disappointing to lose. We have had some disappointing defeats, but this probably is a big disappointment," said Dravid.

"Everyone is going to be disappointed with this, there is no doubt about it. We haven't played well. But there is nothing much we can do about it. We can only learn lessons from this game."

Dravid did not believe that his team lacked conviction, saying they really worked hard.

"Maybe, it looked like that from outside. I know we can look back and be very critical. When you lose, you have got to take the criticism," he said.

"Defending 191 was never going to be easy. We needed wickets at regular intervals and we tried to get those, but we couldn't. The guys tried really hard. It's just that we probably needed 30-40 runs more."

Dravid also defended his decision to bat first after winning the toss on a pitch which had both bounce and movement for seamers early in the morning.

"I don't know if we can regret it (the decision). We could have just batted a lot better. The ball did seam around a lot more and for a bit longer period than we had expected," he said.

"The wicket had a pretty dry look about it. It looked a good wicket to play on. We should have put runs on the board and make it difficult for them in the afternoon, but it didn't work that way because we lost early wickets."

The Indian captain conceded that Bangladesh played better cricket on the day, while his team failed to perform up to their potential.

"They (Bangladesh) are really playing some good cricket. Their bowling was quite outstanding. They bowled really well, especially Mashrafe Mortaza who bowled in good areas with the new ball in good conditions for him," he said.

"Their spinners then kept it tight and didn't give anything away. They have really improved and are playing some really good cricket at the moment. We didn't play anywhere near our potential, and we paid the price for it."